pause and give thanks to the fact that nelson mandela lived. a man who took history in his hands. and bent the arc of the moral universe towards justice. >> nelson mandela visited oakland in 1990s months after he was released in prison. he spent 27 years in a jail cell. ktvu's rob roth is live in oakland with a look at his lasting impression. rob? >> reporter: a sculpture of nelson mandela sits here in oakland. people we spoke with say he leave as legacy of peace and integrity. [ singing ] >> reporter: when nelson mandela appeared a thet oakland coliseum in 1990 -- at the oakland coliseum in 1990. he knew nelson mandela and pictured with him moments before nelson mandela went on stage before that appearance. >> very warm and engaging. there was nothing arrogant about him. but when he spoke his mind you knew where he stood. >> reporter: he visited nelson mandela home a few years later. nelson mandela spent 27 years in prison. he later became president of south africa and a symbol of resistance in civil rights. >> he had no permanent enemies. he